sergeant



(No Model.) 2 Sheets-Sheet 1.

H. C. SERGEANT.

AIR COMPRESSOR.

No. 530,662. Patented Dec. 11, 18 94.

PETERS ca. vunrournou wuumarou o c .(No Model.)

H. O. SERGEANT.

AIR COMPRESSOR.

2 Sheets-Sheet 2.

Patented Dec. 11, 1894;.

UNITED STATES,

' PATENT 'OFFiCE.

HENRY O. SERGEANT, OF WESTFIELD, NEW JERSEY, ASSIGNO-R TO THE INGERSOLL-SERGEANT DRILL COMPANY, OF NEW YORK, N. Y.

AIR-COMPRESSOR.

SPECIFICATION forming part of Letters Patent No. 530,662, dated December 11, 1894. Application filed November 18, 1893. Serial No.491,$08- (No model.)

To all whom it may concern.-

Be it known that I, HENRY O. SERGEANT, of Westfield, in the county of Union and State of New Jersey, have invented a new and useful ImprovementinAir-Compressors, of which the following is a specification.

The object of this invention is to provide an air compressor and an engine for driving the same which shall be of very inexpensive construction, very compact and very eflicient in its operation.-

I will first describe my invention in detail and afterward point out its novelty in the claims.

Figure 1 of the accompanying drawings represents a side view, partly in section, of as much of a horizontal steam engine and of two upright compressors as is necessary for the illustration of my invention. Fig. 2 is a plan View corresponding with Fig. 1, showing the compressor cylinders in section. represents a plan view of an example of my invention embodying two sets of compressors and two motor engine cylinders having connections with one crank-shaft. I

Similarletters of reference designate corresponding parts in all the figures.

A designates a bed-plate'or framing which serves for-the support of the two upright air compressor cylinders B B and of the motor engine cylinder C and on or in which are the bearings a for the crank shaft D of the motor engine and the bearings b of the rock-shaft E, which latter will be hereinafter explained. The two upright compressor cylinders B B are arranged at some distance apart on one side of the motor engine between the cylinder 0 and the crank-shaft D of the latter and at equal distances from a vertical plane passing longitudinally through the cylinder 0 as will be understood by reference to Fig. 2, the bottoms of the said compressor cylinders being about or nearly on a. level with the engine cylinder 0.

As I do not claim any improvements in the compressors themselves norin the motor engine itself, I shall only describe them as far as is necessary toillustrate my improvement, and therefore I have not thought it necessary to representthe valves of either the compressors or of the engine.

Fig. 3

The compressors which I have in part-represented are supposed to be single acting,

the compression being performed above their pistons F F, and said pistons being provided with trunks G G which work through guides in the bottoms of the cylinders.

The engine represented is of common form having its piston-rod H provided with a crosshead I which works in stationary guides c c and which is connected by a connecting rod J with the crank D, but the connecting rod J instead of being connected directly with the cross-head as is common, is connected therewith indirectly through a link (1 as will be presently described.

The rock-shaft E hereinbefore mentioned is arranged parallel with the crank-shaft D at some distance below the engine cylinder and compressor cylinders and midway of the space between the two compressor cylinders. It is furnished with three arms e e and f, of which e e project laterally in opposite directions and are connected one with one of the air compressor pistons and the other with the other of said pistons, the connection being represented as made by rods g'g' contained in the trunks G G. The third arm f which projects upward into alignment with the piston-rod H, is connected by a pin it with the connecting rod J of the engine and is also connected with the cross-head I by the same link (1 hereinbefore mentioned as connecting the connecting rod J with thev cross-head, the pin h serving to connect the connecting rod both with the rod f and the link d, and another pin 2' serving to connect the link at with the cross-head. The said link (1 is represented in Fig. 2 as forked to embrace the end of the connecting rod and the arm f is also represented as forked to receive within it both the link (1 and the connecting rod. (See Fig. 2.)

The three arms e e f of the rock-shaft E constitute a double bell-crank, the two arms f e constituting a bell-crank connection be tween the engine piston and the compressor B F and the two arms f e constituting a bellpressor and a horizontal motor engine, but in such case the compressor should preferably be double acting.

In the operation of the example of my invention which I have illustrated in the drawings, the engine performs the same amount of work in both directions of the stroke of its piston, the power being transmitted from the piston-rod through the bell-crank connections so that during the stroke of the engine piston in either direction one compressor piston re ceives its up-stroke and the other its downstro'ke according to the direction of the engine piston. The engine shaft D being provided with a fly Wheel K, all the movements are easy. The whole system of driving connections is inexpensive especially as the rockshaft E and its arms may be made, as represented in the drawings, of a single casting.

It may be here mentioned that the rockshaft is represented as hollow in order to get the greatest strength with the least Weight.

What I claim as my invention is a 1. The combination of an upright compressor, a horizontal steam engine cylinder and a piston therefor, a rotary shaft and a crank "and fly-wheel thereon, a connectingrod, and a bell-crank one arm of which is connected directly with the rod of thecompressor piston and another arm of which is connected in one direction with the engine piston rod and also connected in the opposite direction by means of the connecting rod with the crank on the rotary shaft, all substantially as herein set forth.

2. The combination of an upright compressor, a horizontal steam engine the pistonrod of which is furnished with a cross-head, guides for said cross-head, a crank-shaft, crank and fly-wheel for said engine, a bellcrank one arm of which projects laterally and is connected directly with the compressor piston-rod and the other arm of which projects upwardly directly into alignment with the eugine piston-rod, a connecting-rod connecting the last mentioned arm on one side with the engine crank, and a link in line with the engine piston-rod connecting the said last mentioned arm on its opposite side with the crosshead, all substantially as herein set forth.

HENRY G. SERGEANT.

Witnesses:

FREDK. HAYNES, GEORGE BARRY. 

